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Edmontosaurus dinosaur foot fossil. Display cast of fossilised bones forming the ankle and foot of an Edmontosaurus dinosaur. The display has been prepared for an exhibition at the Natural History Museum, London, UK, and the bones have been arranged in the position in which they were discovered. Edmontosaurus was a duck-billed dinosaur (hadrosaur) dating from 73 million years ago during the Late Cretaceous Period. (KEYSTONE/SCIENCE PHOTO LIBRARY/NATURAL HISTORY MUSEUM, LONDON/SCIENCE PHOTO LIBRARY)